期刊
NPJ QUANTUM INFORMATION
卷 5, 期 -, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41534-019-0128-0
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资金
- Army Research Office [W911NF-15-2-0058]
- U.S. Department of Defense under DOD [H98230-15-C0453]
- University of Chicago Materials Research Science and Engineering Center - National Science Foundation [DMR-1420709]
- SHyNE, a node of the National Science Foundation's National Nanotechnology Coordinated Infrastructure (NSF) [NNCI-1542205]
- David and Lucile Packard Foundation
We propose and experimentally demonstrate an efficient scheme for bidirectional and deterministic photonic communication between two remote superconducting modules. The two chips, each consists of a transmon, are connected through a one-meter long coaxial cable that is coupled to a dedicated communication resonator on each chip. The two communication resonators hybridize with a mode of the cable to form a dark communication mode that is highly immune to decay in the coaxial cable. We overcome the various restrictions of quantum communication channels established by other recent approaches in deterministic communication for superconducting qubits. Our approach enables bidirectional communication, and eliminates the high insertion loss and large volume footprint of circulators. We modulate the transmon frequency via a parametric drive to generate sideband interactions between the transmon and the communication mode. We demonstrate bidirectional single-photon transfer with a success probability exceeding 60%, and generate an entangled Bell pair with a fidelity of 79.3 +/- 0.3%.
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